NieRMouseFix

How to: Put mouse_patch.dll along with dxgi.dll in game folder and enjoy! You can get it here: https://github.com/ayles/NieRMouseFix/releases

There is one function (not actually one, but...):

void UpdateCameraRotation(CameraAxesValues<float> *axes_rotation, CameraAxesValues<int> *axes_sensitivity,
                          CameraAxesValues<bool> *axes_invert, bool lock_vertical_axes);

Parameters:

axes_rotation - structure with camera vertical and horizontal rotation (in radians).

axes_sensitivity - structure with Vertical Rotation Speed and Horizontal Rotation Speed settings.

axes_invert - structure with Vertical Orientation and Horizontal Orientation settings.

lock_vertical_axes - really I don't know what it is used for, so just use it like I do.

Note that camera smoothing still will be applied after, so use Vertical Auto Adjust and Horizontal Auto Adjust with max values if you want.

Some info:

In DllMain library tries to find function signature in loaded game module. It relies on commands sequence so it isn't really reliable.

Since I do not have money for the game so far, I rely only on an unofficial copy, so I do not know if it will work for you. Open issue if something does not work.

You can compile it and just put in your game folder (with my dxgi.dll or your own).

Note, you need to compile it as 64-bit and it will work only with Visual Studio compiler.

For better experience set Vertical Auto Adjust, Horizontal Auto Adjust and Pursuit Speed to their max values.